Organic light emitting display device for preventing deterioration of driving transistors

Abstract

An organic light emitting display device including an emission unit and a pixel circuit unit. The emission unit includes an organic light emitting diode. The pixel circuit unit includes a driving transistor, at least one or more switching transistors, a capacitor, a light blocking unit, and an opening in which the light blocking layer is not formed. The light blocking unit includes a light blocking layer which blocks light input to the pixel circuit unit. The pixel circuit unit is configured to drive the emission unit and selectively block the light input to the pixel circuit unit.

What is claimed is: 
     
       1. An organic light emitting display device comprising:
 an emission unit including an organic light emitting diode; and 
 a pixel circuit unit including: 
 a driving transistor, 
 at least one or more switching transistors, 
 a capacitor, 
 a light blocking unit, and 
 an opening in which the light blocking layer is not provided and in which a sub-pixel and the at least one or more switching transistors are provided, 
 wherein,
 the light blocking unit includes a light blocking layer which blocks light input to the pixel circuit unit, and 
 the pixel circuit unit is configured to drive the emission unit and selectively block the light input to the pixel circuit unit. 
 
 
     
     
       2. The organic light emitting display device of  claim 1 , wherein,
 the light blocking unit is an area other than the emission unit and the opening in a sub-pixel which includes the emission unit and the pixel circuit unit, and 
 the light blocking unit includes a portion of the capacitor. 
 
     
     
       3. The organic light emitting display device of  claim 1 , wherein an area in which the light blocking unit and the opening are provided in a sub-pixel is different depending on a color of light emitted from a sub-pixel including the emission unit. 
     
     
       4. The organic light emitting display device of  claim 3 , wherein,
 when the sub-pixel is configured to emit white or blue light, the opening is an area in which the at least one or more switching transistors and the driving transistor are provided, 
 when the sub-pixel is configured to emit red or green light, the opening is an area in which the at least one or more switching transistors are formed. 
 
     
     
       5. The organic light emitting display device of  claim 4 , wherein,
 when the sub-pixel is configured to emit white or blue light, the opening is a portion of an area in the sub-pixel, in which the at least one or more switching transistors are provided, and a portion of an area in which the driving transistor is provided. 
 
     
     
       6. The organic light emitting display device of  claim 1 , wherein each of the at least one or more switching transistors and the driving transistor includes an active layer, a gate electrode, a source electrode, and a drain electrode. 
     
     
       7. The organic light emitting, display device of  claim 6 , wherein the active layer is formed of an oxide semiconductor. 
     
     
       8. The organic light emitting display device of  claim 1 , wherein the light blocking layer is formed of one of a conductive material, a semiconductor material, and a black resin material. 
     
     
       9. The organic light emitting display device of  claim 1 , wherein a light transmittance of the light blocking layer is changed depending on a thickness of the light blocking layer. 
     
     
       10. The organic light emitting display device of  claim 1 , further comprising:
 a driving power line; 
 a reference voltage line; and 
 a data line, 
 wherein the light blocking unit includes a portion of each of the driving power line, the reference voltage line, and the data line. 
 
     
     
       11. An organic light emitting display device comprising:
 an emission unit including an organic light emitting diode; 
 a capacitor; 
 a light blocking unit provided wider a driving transistor and including a light blocking layer, the light blocking unit configured to prevent light from being input to the driving transistor; and 
 a pixel circuit unit including first and second switching transistors and an opening which is an area in which the light blocking layer is not provided, the pixel circuit unit being configured to drive the emission unit, 
 wherein the opening is an area in which the first and second switching transistors are provided, and 
 wherein the light blocking layer is configured to allow light input to the first and second switching transistors. 
 
     
     
       12. The organic light emitting display device of  claim 11 , wherein,
 the light blocking unit is an area other than the emission unit and the opening in a sub-pixel which includes the emission unit and the pixel circuit unit, and 
 the light blocking unit includes a portion of the capacitor. 
 
     
     
       13. The organic light emitting display device of  claim 11 , wherein an area in which the light blocking unit and the opening are provided in a sub-pixel is different depending on a color of light emitted from a sub-pixel including the emission unit. 
     
     
       14. The organic light emitting display device of  claim 13 , wherein,
 when the sub-pixel is configured to emit white or blue light, the opening is an area in which the first and second switching transistors and the driving transistor are formed, 
 when the sub-pixel is configured to emit red or green light, the opening is an area in which the first and second switching transistors are provided. 
 
     
     
       15. The organic light emitting display device of  claim 14 , wherein,
 when the sub-pixel is configured to emit white or blue light, the opening is a portion of an area in the sub-pixel, in which the first and second switching transistors are provided, and a portion of an area in which the driving transistor is provided. 
 
     
     
       16. The organic light emitting display device of  claim 11 , wherein each of the first and second switching transistors and, the driving transistor includes an active layer, a gate electrode, a source electrode, and a drain electrode. 
     
     
       17. The organic light emitting display device of  claim 16 , wherein the active layer is formed of an oxide semiconductor. 
     
     
       18. The organic light emitting display device of  claim 11 , wherein the light blocking layer is formed of one of a conductive material, a semiconductor material, and a black resin material. 
     
     
       19. The organic light emitting display device of  claim 11 , wherein a light transmittance of the light blocking layer is changed depending on a thickness of the light blocking layer.